JP4524381B2 - Composite material of titanium and ceramics and method for producing the same - Google Patents

Description

  The present invention relates to a composite material in which titanium, a titanium alloy, and ceramics such as apatite are cast to suppress a reaction layer at a joint interface, and to a composite material, and a manufacturing method thereof, and more particularly, titanium or a titanium alloy. And a composite material including ceramics, and a part or all of titanium or a titanium alloy is made of a cast material, and a defect such as delamination is present at the joint interface between the titanium or titanium alloy and the composite material. The present invention relates to a cast composite material having a reaction suppressing layer, a method for producing the same, and an application. The composite material of the present invention can be used as a structural material such as an artificial joint, an artificial tooth root, an inlay, and an implant embedded in a living body such as a crown, an aircraft, etc. The present invention provides a new titanium / ceramic composite material that enables tailor-made medical treatment tailored to the use and use of individual customers and patients.

  Titanium and titanium alloys have high specific strength, excellent corrosion resistance, and biocompatibility, and are therefore used for structural materials such as aircraft and medical materials. With regard to medical materials, the need for bone substitute materials and implants is increasing with the aging society. In addition, bone substitute materials are required not only for elderly people but also for children and adults who have bone defects due to, for example, an accident. For this reason, it is desirable to diversify the required shape and the required performance for each individual, and to design a material (tailor made) tailored to the individual, and a higher performance implant is required.

  Ceramics and titanium are mainly used as bone substitute materials. Ceramics such as hydroxyapatite and calcium triphosphate (TCP) are chemically bonded to bone and excellent in strength, but have brittle properties, so that it is difficult to use them for stem portions that are heavily loaded. Titanium and titanium alloys are not as hard as ceramics, but have high toughness, and thus have been put to practical use in artificial bones, stems, crowns, bridges, artificial roots and the like in the fields of orthopedics and dentistry. These products are sometimes manufactured by casting, and are tailor-made, and are effective techniques for manufacturing titanium parts tailored to patients and affected areas. Titanium does not chemically bond to living bones, so a composite material obtained by combining titanium and ceramics is considered to be a higher performance implant.

  When combining ceramics with titanium or a titanium alloy, if the cast formability of titanium can be used, molding becomes easier. In general, titanium is known as a difficult-to-process material, but if a casting method is used, shape forming becomes easy. In fact, titanium casting machines are widespread in the field of dentistry, and if there is technology that can join and combine ceramics and titanium or titanium alloys using these casting machines, the shape can be freely set in the medical field. It is also useful as a tailor-made method because it increases the degree. However, the melting point of titanium is as high as 1650 ° C, and when molten titanium is poured into ceramics, they react greatly, and a large reaction layer is formed, or gas is generated to form cavities, so that the ceramic and titanium are separated. There was a problem of doing.

  As a conventional technique, for example, in the production of an artificial hip joint, a wet-synthesized calcium phosphate powder is calcined at a high temperature, then pulverized with a wet ball mill, added with a binder, and dispersed in a slurry. The powder obtained by spray-drying it is granulated and then fired to obtain a round tricalcium phosphate coarse powder. The coarse powder is then heated to form a wax mold having the same shape as the artificial joint. After sprinkling on the surface, the coarse powder adhering to the surface of the wax mold is pressed to produce a composite wax mold in which the coarse powder is partly exposed and a casting mold is made using this composite wax mold. There has been proposed a method of obtaining a Ti alloy artificial hip joint in which a Ti alloy is cast and a tricalcium phosphate coarse powder is embedded (see Patent Document 1). However, this type of method shows that ceramics can create a state of protruding from the titanium surface as a composite material form, but does not define any method for suppressing the reaction between high temperature molten titanium and ceramics. Therefore, the above problem cannot be solved.

   Furthermore, in dental casting, a reaction layer between a mold and a Ti alloy is generally known as a hardened layer and must be removed after casting (Non-patent Document 1). Reducing this hardened layer is also important from the viewpoint of reducing the surface cutting work of titanium castings and improving quality such as shape reproducibility. Therefore, there has been a strong demand for a technique for joining and compounding and a composite material thereof. In the casting method, it is possible to control the properties and structure in the same molded body by placing metal in the casting mold or by producing a composite with metal. In this case as well, control of the reaction layer at the interface is important because the properties of the composite will change if a reaction layer larger than necessary is generated. Also, when casting titanium or titanium alloy using ceramics or metal for part or all of the mold and then removing the mold to obtain a titanium compact, the stability of the properties of the near net shape or titanium compact Also, from the viewpoint of labor for post-processing, etc., it is important to reduce the reaction layer in the titanium molded body.

  Furthermore, a titanium laser welding method has been proposed as a method that has a high degree of freedom in the field and is used as tailor-made (Non-Patent Document 2). This type of method is used, for example, in the case of producing a titanium crown bridge while dissolving a thin titanium wire by laser heating, but a dedicated laser device is required separately. Usually, this type of method is not suitable for manufacturing a wide range of shapes such as processing the entire molded body because the laser is concentrated in a narrower range to dissolve and process titanium. Further, since the material is heated to a high temperature by laser heating, this is the same as casting, and the above-described problem occurs. This method also requires a technique for laser bonding, and has problems such as being limited to materials that can be bonded.

Japanese Patent No. 2956318 Japanese Dental Technique, No.340, 13-27 (1997) Dental materials and instruments, 18, 352-358 (1999)

  Under such circumstances, the present inventor has developed a new titanium composite material, a method for producing the same, and the like that can surely solve the problems in the prior art while continuing research on titanium and ceramics for many years. As a result of intensive research with the goal of developing, we found that the conventional problems can be solved by casting titanium after using the titanium casting method to cool the casting mold and material. The present invention has been completed. That is, an object of the present invention is to produce and provide a composite material that suppresses a reaction at a bonding interface between ceramics and titanium or a titanium alloy. Another object of the present invention is to provide a composite material having high strength, high corrosion resistance, and biocompatibility. Another object of the present invention is to provide biomaterials such as high-performance implants made of a composite material of ceramics and titanium, and structural materials such as aircraft. In addition, the present invention makes use of the fact that shape formation can be performed at the same time as production. For example, in medical practice, by selecting the material of the casting destination, various composite materials can be produced and adapted to individual patients and applications. It is an object of the present invention to provide a medical material that can be designed (tailor-made).

The present invention for solving the above problems is a cast composite of titanium or a titanium alloy and a composite material, wherein a part or all of titanium or the titanium alloy is made of a cast material, and is composited with titanium or a titanium alloy. Casting characterized in that there is no defect at the bonding interface with the material, and the portion made of titanium or titanium alloy at the bonding interface acts as a layer that suppresses the reaction between titanium or titanium alloy and the composite material Composite material. The present cast composite material is: (1) the composite material is ceramics, metal, ceramic-metal composite, or ceramics and / or metal containing organic matter; (2) the ceramic is calcium phosphate, oxide, It is a preferred embodiment that it is a nitride, a carbide, or a carbonate compound, (3) that calcium phosphate is TCP or hydroxyapatite, and (4) that the composite material is a porous body. Moreover, this invention is a biocompatible member characterized by consisting of said cast composite material. In a preferred embodiment, the present invention is a tailor-made material that can be processed in the medical field, and is made of all or part of the above-described cast composite material. Moreover, this invention consists of said cast composite material, It is a structural member characterized by having high corrosion resistance.
When the composite interface is produced by casting molten titanium or a titanium alloy, titanium or a titanium alloy having a low thermal conductivity of about 50 ° C. is generated at the interface, and the titanium or titanium alloy serves as a barrier. It is formed as a part of the bonding interface that becomes a layer and suppresses the reaction between the two, and there is no layer of another substance.

The present invention also relates to a method for producing a cast composite of titanium or a titanium alloy and a composite material, wherein the composite material and / or the mold is cooled, and then molten titanium or a titanium alloy is cast to obtain titanium or titanium. When manufacturing a cast composite material of an alloy and a composite material, a portion of the joint interface that acts as a layer that suppresses a reaction between titanium or the titanium alloy and the composite material, which is made of titanium or a titanium alloy, A method for producing a cast composite material, characterized in that it is formed. The method includes (1) cooling the composite material and / or mold to at least 0 ° C. to suppress reaction at the bonding interface, and (2) the composite material is ceramic, metal, ceramic and metal (3) Ceramics are calcium phosphate, oxide, nitride, carbide, or carbonate compound, (4) Calcium phosphate is TPC, or Being hydroxyapatite, (5) The mold is made of ceramics, metal, or a composite of ceramics and metal, and (6) Ceramics, metal, organic substance, or a combination of them is used as a composite material in the mold. Or as part of the mold and cast titanium or titanium alloy and composite material by casting titanium or titanium alloy Making a composite material, and the preferred embodiments and be produced in the medical field (7) the cast composite material.

Next, the present invention will be described in more detail.
The cast composite material of the present invention is a cast composite of titanium or a titanium alloy and a composite material. In the cast composite of titanium or a titanium alloy, a part or all of titanium or the titanium alloy is made of a cast material. In addition, there is no defect and it has a reaction suppression layer. In the present invention, “casting” means to form a predetermined shape by once melting or semi-melting a metal and then cooling it. For example, casting in a mold includes welding by laser heating and the like. It is a waste. In addition, the “reaction suppression layer” is a reaction layer in which the reaction between the ceramic and molten titanium or titanium alloy is suppressed, and for example, oxygen, nitrogen, carbon, metal elements, etc. of the ceramic In addition, it means a bonded interface layer in which a reaction in which molten titanium reacts to generate a compound such as an oxide, nitride, carbide, or a gas component having a high vapor pressure is suppressed.

  Examples of titanium or titanium alloy used in the present invention include pure titanium JIS 1-4 types, Ti-Al-V alloys, etc., and examples of the composition thereof include Ti, Nb, Ta, W, Zr, One or more of P, Au, Ca, Ag, Pt, Al, V, Si, B, N, C, Pd, Y, Hf, Ir, Mo, Fe, Mg, Na, K, Co, Cr Examples include materials made of elements, and in particular, pure titanium is suitable, but is not limited thereto.

  In the present invention, ceramic, metal, a composite of ceramic and metal, or ceramic and / or metal containing an organic substance is used as the composite material. Among them, as ceramics, for example, Nb, Ta, W, Zr, P, Au, Ca, Ag, Pt, Al, V, Si, B, N, C, Pd, Y, Hf, Ir, Mo, Examples include one, two or more oxides, nitrides, carbides, etc. of Fe, Mg, Na, K, Co, Cr. Specifically, for example, calcium phosphates such as TCP and hydroxyapatite, oxides such as aluminum oxide, titanium oxide, and magnesium oxide, nitrides such as titanium nitride and aluminum nitride, carbides such as titanium carbide and aluminum carbide, and carbonic acid Carbonate compounds such as apatite and calcium carbonate are exemplified, but as a biocompatible medical material such as an artificial joint, an artificial tooth root, and an artificial bone, TCP, hydroxyapatite and the like are particularly preferable, and a crown is manufactured. For example, gypsum and phosphate-based investment materials are suitable.

  Examples of the metal include Ti, Nb, Ta, W, Zr, P, Au, Ca, Ag, Pt, Al, V, Si, B, N, C, Pd, Y, Hf, Ir, Mo, Examples of the material include one or more of Fe, Mg, Na, K, Co, and Cr. Furthermore, examples of organic substances include polylactic acid, polyvinyl alcohol, Teflon (registered trademark), silicone, porcelain, polymethyl methacrylate, polycarbonate, polyethylene, polyethylene terephthalate, polytetrafluoroethylene, polyvinyl chloride, polyurethane, collagen, polyamide, and the like. Is exemplified.

  In the present invention, by making these composite materials porous, it is possible to improve the bondability with titanium, reduce the weight of the prepared composite, and the like. In the cast composite material of the present invention, the composite material is placed in a mold or configured as a part of the mold, and then the composite material and / or the mold is cooled to obtain a titanium melt. It is produced by casting and casting. By producing such a composite material with metal, ceramics, organic matter, etc., it is possible to improve the properties as a composite material and develop more useful applications.

  In the present invention, for example, when molten titanium at 1650 to 1900 ° C. is poured into a mold in which ceramics cooled to 0 ° C. or less are disposed, a strong bonding force is generated at the portion where the ceramic and molten titanium are in contact. After the molten titanium cools, there is little reaction between the two at this interface, there is no defect such as peeling, and the two are firmly bonded. When joining ceramics and titanium, it is sufficient to cool only the ceramic joint, but in practice the size of the composite material to be produced, the amount of ceramics and titanium used, the temperature, the heat capacity of the mold, etc. Considering the above, the cooling location, range, temperature, etc. are determined. The casting temperature is usually preferably in the range of 1650 to 1900 ° C.

  The temperature for cooling the ceramic is at least 0 ° C. or less, preferably −50 to −250 ° C. The means for cooling the ceramics is not particularly limited, and examples thereof include liquid nitrogen, liquid helium, organic solvent, dry ice, cooling gas, or ice, and cooling with liquid, gas, or solid is possible. Such a cooling means is appropriately selected and used according to the temperature at which the ceramic is cooled.

  For example, in the case of an artificial joint, the composite material of the present invention, after determining the shape of the transplant site by a shape measurement method such as X-ray CT, and after processing the mold into a shape that can be easily transplanted using a technique such as a rapid prototype Then, ceramic such as α-TCP is placed on the inner surface of the mold corresponding to the necessary part, and the entire mold is cooled with liquid nitrogen, and then molten titanium is cast and cast. Here, as a component of the titanium alloy, for example, Ti, Nb, Ta, W, Zr, P, Au, Ca, Ag, Pt, Al, V, Si, B, N, C, Pd, Y, Hf , Ir, Mo, Fe, Mg, Na, K and the like are exemplified, but not particularly limited thereto. Here, the cooling may be performed by a cooling method other than liquid nitrogen, and the cooling temperature is preferably as low as possible without affecting the shape of the manufactured product. Further, cooling may be performed during or after casting. If necessary, ceramics, metal, organic matter, etc., or a combination thereof is placed in the mold or as a part of the mold and cast in advance. In the present invention, if necessary, after casting, a part of the composite material, or a part or all of the composite mold or material is deleted. However, it is desirable to dispose a material having a higher decomposition temperature in the portion in contact with the cast titanium. Furthermore, if necessary, in order to improve the adhesion between the casting material and titanium or a titanium alloy, it is desirable to carry out a surface treatment such as the composition of the surface of the casting material and the inclination of the structure.

  In addition, the composite material of the present invention, for example, in the case of an artificial tooth root, determines the shape of the transplant site by a shape measurement method such as X-ray CT, and uses a technique such as rapid prototype to process the mold into a shape that is easy to transplant After installing ceramics such as α-TCP on the inner surface of the mold corresponding to the required part, placing a titanium metal female screw for attaching the upper structure in the center of the mold, cooling the whole mold in liquid nitrogen, Cast titanium and cast.

  Here, the constituent components of the titanium alloy include, for example, Ti, Nb, Ta, W, Zr, P, Au, Ca, Ag, Pt, Al, V, Si, B, N, C, Pd, Y, Hf, Ir, Mo, Fe, Mg, Na, K, etc., but are not limited thereto. As for cooling, a cooling method other than liquid nitrogen may be used, and the lower the cooling temperature is, the better it is within a range that does not affect the shape of the manufactured product. Further, cooling may be performed during or after casting. At this time, if necessary, ceramics, metal, organic matter, etc., or a combination thereof is placed in the mold or as a part of the mold and casted in advance. Further, if necessary, a part of the composite material or a part or all of the composite mold or material is deleted after casting. However, it is desirable to dispose a material having a high decomposition temperature in a portion in contact with cast titanium. Further, if necessary, it is desirable to perform surface treatment such as the composition of the surface of the casting material and the inclination of the structure in order to improve the adhesion between the casting material and titanium or a titanium alloy.

  In addition, the composite material of the present invention, for example, in the case of an inlay, a crown, or the like, measures and determines the shape of the transplant site with an impression material, and after processing the mold or the disappearance model into a shape that can be easily transplanted, Immerse in liquid nitrogen and cool to cast titanium. Then, after removing the mold material, fine adjustment according to the application site is performed. Here, the constituent components of the titanium alloy include, for example, Ti, Nb, Ta, W, Zr, P, Au, Ca, Ag, Pt, Al, V, Si, B, N, C, Pd, Y, Hf, Ir, Mo, Fe, Mg, Na, K and the like are not limited thereto. As for cooling, a cooling method other than liquid nitrogen may be used, and the lower the cooling temperature is, the better it is within a range that does not affect the shape of the manufactured product. Further, cooling may be performed during or after casting. At this time, if necessary, ceramics, metal, organic matter, etc., or a combination thereof is placed in the mold or as a part of the mold and casted in advance. However, it is desirable to dispose a material having a high decomposition temperature in a portion in contact with cast titanium. Further, if necessary, it is desirable to perform surface treatment such as the composition of the surface of the casting material and the inclination of the structure in order to improve the adhesion between the casting material and titanium or a titanium alloy.

  Thus, in the present invention, if necessary, it is possible to delete a part of the composite material after casting, or a part or the whole of the composite mold or material to produce the target composite material. is there. However, it is desirable to dispose a material having a higher decomposition temperature in the portion in contact with the cast titanium. Furthermore, if necessary, in order to improve the adhesion between the material of the casting destination and titanium or a titanium alloy, for example, the casting surface material such as the outermost surface having a lot of Ti and increasing the amount of Ca or P as it goes inside. It is desirable to perform a surface treatment such as inclining the composition of the surface of the surface, or inclining the structure such as gradually changing the porosity.

  The present invention makes it possible to cool a ceramic and / or a mold and cast molten titanium to produce a composite, thereby suppressing reaction at the interface between them. Regarding the thermal conductivity of metals, in the case of ordinary metals such as aluminum and stainless steel, the thermal conductivity decreases as the temperature decreases, and conversely, the higher the temperature, the easier the heat is transmitted and the more reactive it is. It becomes a situation where the reaction tends to be accelerated by heating. However, in the case of titanium, in the range from high temperature to near room temperature, the thermal conductivity is the lowest at around 50 ° C., the thermal conductivity increases at lower temperatures, and the thermal conductivity increases up to about −200 ° C. However, below this temperature, the thermal conductivity also decreases. In the titanium composite material of the present invention, by cooling the material to be combined, titanium near 50 ° C. of the interface becomes a barrier layer, and both are in a state of canceling out the heat of the low temperature portion and the high temperature portion with good thermal conductivity, The heat in the high temperature part is not easily transmitted to the low temperature part. Therefore, from the above-described properties of titanium, it is possible to suppress the reaction between ceramics and titanium and produce a composite. In FIG. 1, the conceptual diagram of the temperature distribution in a composite interface is shown.

  Normally, when producing a composite material of ceramics and titanium, if molten titanium is poured into the ceramics, the ceramics and titanium react significantly to form a large reaction layer or hardened layer, or gas is generated and hollowed out. And defects due to peeling and the like occur at the interface between the two. This reaction is due to the reaction of oxygen, nitrogen, carbon, metal elements and the like of the ceramic with molten titanium to produce compounds such as oxides, nitrides and carbides, and gas components having a high vapor pressure. Such a reaction between the ceramic and the molten titanium is considered to be caused by, for example, a temperature rise due to heat conduction at the contact surface between the ceramic and titanium. In the present invention, it is possible to reduce the reactivity of the ceramics at the contact interface by controlling the temperature rise of the ceramics due to heat conduction. By cooling the ceramics to at least 0 ° C. or less, bonding It is possible to produce and provide a cast composite material having a reaction suppression layer in which the reaction between ceramic and titanium at the interface is suppressed.

  The present invention relates to a cast composite material of melted or semi-molten titanium and ceramic, a production method thereof and a product. According to the present invention, (1) the reaction between ceramic and titanium is suppressed, It is possible to provide a composite technology and a composite or molded body thereof. (2) It is possible to provide a composite material in which titanium is composited with the same kind or different kind of ceramics, metal, and a material containing an organic substance thereof. (3) It is possible to produce and provide a cast composite having a reaction suppressing layer without defects such as peeling. (4) A ceramic and titanium composite material can be produced with a commercially available dental casting machine or the like. It is possible, and if used for dental technicians, etc., the cutting process of the hardened layer will be reduced. (5) At the medical site, etc. Supply Therefore, it can be used in a wide range of applications and tailor-made. (6) Since the present invention can be applied to ordinary casting methods and welding methods, it can also be introduced into an automated production system. A special effect is produced.

  EXAMPLES Next, although this invention is demonstrated concretely based on an Example, this invention is not limited at all by the following Examples.

  In this example, a composite made of a ceramic sintered body and titanium was produced. Ceramic powder (apatite α-TCP, manufactured by Wako Pure Chemical Industries, Ltd.) was molded and sintered at a temperature of 1000 ° C. to 1300 ° C. to prepare a ceramic disk having a diameter of 10 mm to 20 mm. The ceramic disk was placed in a mold, and a titanium (JIS type 2, manufactured by Daido Steel Co., Ltd.) melt was cast on the mold in an atmosphere of argon (99.9%, manufactured by Nippon High Pressure Gas Co., Ltd.). At that time, the ceramics and the mold were sufficiently cooled in advance with liquid nitrogen.

  An appearance photograph of the obtained composite is shown in FIG. Even when removed from the mold, the composite was stable without breaking. FIG. 3 shows a cross-sectional photograph of this composite. This cross-sectional photograph is a state in which a part of the ceramic is forcibly cut out for easy cutting. As comparative examples, FIGS. 4 and 5 show examples of molded articles produced by normal casting without cooling ceramics and molds. In the molded body, ceramics were detached at the stage of taking out from the mold. There was also a large reaction layer at the interface, and cavities thought to be traces of gas generated during the reaction were also observed.

  Furthermore, the thicknesses of both reaction layers were measured and compared. FIG. 6 is a graph of the thickness of the reaction layer of the composite by the normal casting method (sample 1) and the composite by the method of this example (sample 2), and Table 1 shows the normal casting method. The comparison of the reaction layer of a composite_body | complex (sample 1) and the composite_body | complex (sample 2) by the method of a present Example is shown. The horizontal axis in the graph is the position (diameter direction distance) in the sample. The composite reaction layer produced by the method of this example had less variation and fewer cavities than the composite reaction layer produced by the ordinary casting method.

  In this example, a composite made of ceramic particles and titanium was produced. Particles of ceramics (apatite HAP, manufactured by Wako Pure Chemical Industries, Ltd.) having a diameter of 1 mm or less were placed in a mold, and a titanium (JIS type 2, manufactured by Daido Special Steel Co., Ltd.) melt was added to the argon (99. 9%, manufactured by Nippon High Pressure Gas Co., Ltd.) At that time, the molded body produced by casting after sufficiently cooling the ceramics and the mold with liquid nitrogen was compounded with the reaction layer greatly reduced. On the other hand, in the molded body produced by normal casting without cooling, the ceramic particles reacted greatly.

  In this example, a composite material made of ceramics, a titanium rod and cast titanium was produced. Titanium rods with a diameter of 1 cm to 3 cm and ceramics with a diameter of 1 cm to 3 cm (apatite α-TCP, manufactured by Wako Pure Chemical Industries, Ltd.) are placed with an interval of 0.1 cm to 4 cm, and they are placed in liquid nitrogen. After being sufficiently cooled in the furnace, molten titanium (JIS 2 type, manufactured by Daido Steel Co., Ltd.) melted between the ceramic and rod-shaped titanium in an argon (99.9%, manufactured by Nippon High Pressure Gas Co., Ltd.) atmosphere. Casting and casting. In the composite material produced, the titanium rod, ceramics and solidified titanium were integrated without separation.

  In this example, a titanium casting was produced using a ceramic mold. Using a dental caster, molten titanium (JIS type 2, manufactured by Daido Steel Co., Ltd.) is cast in a sufficiently cooled ceramic mold in an argon (99.9%, manufactured by Nippon High Pressure Gas Co., Ltd.) atmosphere. And cast. At this time, the surface reaction layer and the hardened layer are greatly reduced in the titanium casting produced by casting after sufficiently cooling the ceramics and mold with liquid nitrogen in advance, compared with the titanium casting produced by ordinary casting. Was.

  As described above in detail, the present invention relates to a cast composite of titanium or a titanium alloy and a composite material and a method for producing the same, and the present invention suppresses the reaction between titanium and ceramics, Further, it is possible to manufacture and provide a cast composite material having no reaction and having a reaction suppression layer. Moreover, this invention can be implemented using a commercially available dental casting machine etc. If it is used for dental technicians etc., the process of cutting a hardened layer will be reduced. Furthermore, in a medical field etc., it can be applied to a wide range of uses and tailor-made by supplying composites and molded bodies suitable for the use and use of individual customers and patients. Moreover, since this invention can respond to a normal casting method or welding method, it can also be introduced into an automated production system.

The conceptual diagram of the temperature distribution of a composite interface is shown. The external appearance photograph of the composite_body | complex by the manufacturing method which concerns on this invention is shown. The cross-sectional photograph of the composite_body | complex by the manufacturing method which concerns on this invention is shown. The appearance photograph of the composite by the normal casting method is shown. The cross-sectional photograph of the composite_body | complex by a normal casting method is shown. The change of the thickness of the reaction layer of the composite body (sample 1) by the normal casting method and the composite body (sample 2) by the casting method according to the present invention is shown.

Claims (16)

  A cast composite of titanium or a titanium alloy and a composite material, wherein a part or all of titanium or the titanium alloy is made of a cast material, and there is no defect at the joint interface between the titanium or the titanium alloy and the composite material, A cast composite material, wherein a portion made of titanium or a titanium alloy at the joint interface acts as a layer for suppressing a reaction between titanium or the titanium alloy and the composite material.   The cast composite material according to claim 1, wherein the composite material is ceramic, metal, a composite of ceramic and metal, or ceramic and / or metal containing an organic substance.   The cast composite material according to claim 2, wherein the ceramic is calcium phosphate, oxide, nitride, carbide, or carbonate compound.   The cast composite material according to claim 3, wherein the calcium phosphate is TCP or hydroxyapatite.   The cast composite material according to claim 1, wherein the composite material is a porous body.   A biocompatible member comprising the cast composite material according to any one of claims 1 to 5.   The biocompatible member according to claim 6, wherein the biocompatible member is a tailor-made material that can be processed at a medical site, and is made of all or part of the cast composite material.   A structural member comprising the cast composite material according to claim 1 and having high corrosion resistance.   In a method for producing a cast composite of titanium or a titanium alloy and a composite material, the composite material and / or the mold is cooled, and then molten titanium or a titanium alloy is cast to obtain the titanium or titanium alloy and the composite material. When producing a cast composite material, a portion of a joint interface that functions as a layer that suppresses a reaction between titanium or a titanium alloy and the composite material, which is composed of titanium or a titanium alloy, is formed. A method for producing a cast composite material.   The method for producing a cast composite material according to claim 9, wherein the composite material and / or the mold is cooled to at least 0 ° C. or less to suppress a reaction at the joint interface.   The method for producing a cast composite material according to claim 9, wherein the composite material is ceramic, metal, a composite of ceramic and metal, or ceramic and / or metal containing an organic substance.   The method for producing a cast composite material according to claim 11, wherein the ceramic is calcium phosphate, oxide, nitride, carbide, or carbonate compound.   The method for producing a cast composite material according to claim 12, wherein the calcium phosphate is TPC or hydroxyapatite.   The method for producing a cast composite material according to claim 9, wherein the mold is made of ceramic, metal, or a composite of ceramic and metal.   Ceramics, metal, organic matter, or a combination thereof is placed in a mold as a composite material or as a part of the mold, and titanium or titanium alloy is cast to form a composite material of titanium or titanium alloy and composite material. The manufacturing method of the casting composite material of Claim 9 which produces a casting composite material.   The method for producing a cast composite material according to claim 9, wherein the cast composite material is produced in a medical field.